Permian Gastropoda of the Southwestern United States
Subtitle: 2 : Pleurotomariacea: Portlockiellidae ...
Series: Bulletin of the American Museum of Natural History -- Vol. 114, Art. 2, 1958; Bulletin of the American Museum of Natural History -- v. 114, article 2
Publisher: Amer. Mus. of Nat. Hist.
Published: 1958
Place of publication: New York
Language: eng
Number of pages: 246
Notes: Submitted in partial fulfillment of the requirements for the degree of doctor of philosophy ...